Front brakes lock up

Engine compartment

Toyota Matrix - fuse box - engine compartment

Instrument panel

Toyota Matrix - fuse box - instrument panel

Fuses (type A)

Fuse Ampere rating Description 1 FOG 15 Front fog lights 2 HEAD LH UPR 10 Left?hand headlight (high beam) 3 HEAD RH UPR 10 Right?hand headlight (high beam), high beam indicator light 4 SPARE 30 Spare fuse 5 SPARE 15 Spare fuse 6 SPARE 10 Spare fuse 7 ETCS (1ZZ?FE engine with two?wheel drive models only) 10 Electronic throttle control system 8 AMP 30 Car audio system 9 MAIN 30 Starting system, "AM2" fuse 10 DOME 15 Car audio system, clock, personal lights, interior light, trunk light, open door warning light, wireless remote control system 11 HORN 10 Horn 12 HAZARD 10 Emergency flashers, turn signal lights 13 EFI 15 Multiport fuel injection system/sequential multiport fuel injection system, emission control system, "EFI" fuse 14 ALT?S 5 Charging system 15 HEAD LH LWR 10 Left?hand headlight (low beam) 16 HEAD RH LWR 10 Right?hand headlight (low beam) 17 EFI2 (1ZZ?FE engine with two? wheel drive models only) 15 Multiport fuel injection system/ sequential multiport fuel injection system, emission control system 18 TAIL 15 Tail lights, license plate lights, instrument panel lights, instrument cluster lights, clock 19 OBD 7,5 On?board diagnosis system 20 WIPER 25 Windshield wipers 21 AM2 15 Charging system, multiport fuel injection system/sequential multiport fuel injection system, starting system, SRS airbag system 22 STOP 15 Stop lights, high mounted stoplight, anti?lock brake system, shift lock control system, multiport fuel injection system/sequential multiport fuel injection system, cruise control system 23 DOOR 25 Power door lock system, glass hatch opener switch 24 AM1 25 "CIG" fuse 25 ECU?IG 10 Electric cooling fan, anti?lock brake system, traction control system, vehicle stability control system, brake assist system, shift lock control system, cruise control system 26 RR WIPER 15 Rear window wiper 27 A/C 10 Air conditioning system 28 INV 15 Power outlet (115 VAC) 29 P/POINT 15 Power outlet (12 VDC/ in the rear console box) 30 ECU?B 10 Daytime running light system 31 CIG 15 Power outlet (on the instrument panel) or cigarette lighter, car audio system, clock, power rear view mirror control, shift lock control system 32 GAUGE 10 Gauges and meters, air conditioning system, daytime running light system, charging system, auto anti?glare inside rear view mirror, power windows, cruise control system, rear window defogger, back?up lights, front passenger's seat belt reminder light 33 WASHER 15 Windshield washer, rear window washer 34 M?HTR/DEF I?UP 10 Engine control system

Fuses (type B)

Fuse Ampere rating Description 35 ABS NO.1 30 Anti?lock brake system, vehicle stability control system, traction control system, brake assist system 36 RDI FAN 30 Electric cooling fan 37 ABS NO.2 40 (without vehicle stability
control system) Anti?lock brake system 50 (with vehicle stability
control system) Anti?lock brake system, vehicle stability control system, traction control system, brake assist system 38 HEAD MAIN 40 "HEAD LH UPR", "HEAD RH UPR", "HEAD LH LWR" and "HEAD RH LWR" fuses 39 AIR PUMP 50 (1ZZ?FE engine with four?wheel drive models and 2Z ?GE engine only) Emission control system 40 HTR 40 Air conditioning system 41 DEF 30 Rear window defogger, "M?HTR/DEF I?UP" fuse 42 POWER 30 Power windows, electric moon roof

Fuses (type C)

Fuse Ampere rating [A] Description 43 ALT 100 Charging system, "ABS NO.1", "ABS NO.2", "RDI FAN", "FOG", "HTR", "AM1", "POWER", "DOOR", "ECU?B", "TAIL", "STOP", "P/POINT", "INV" and "OBD" fuses WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

A 4 WD.is not meant to drive in four wheal drive unless on slippery surface like mud, ice, etc. the front drive wont slip like an AWD and will cause a bind if the wheals don't slip to take out the built up torque. This can damage the front lock hubs. Try it off road and see if it still dose it.

Does it have manual locking front hubs? Some people fit these to full time four wheel drive vehicles to reduce driveline effort and increase fuel efficiency. The issue is that the drive from the transfer case will find the path of least resistance which if the front hubs are not locked power will be sent through the front diff and only spin the front drive shafts. To ensure drive power is sent to the rear diff the centre diff needs to be locked. If you do have manual locking front hubs try putting them in the locked position and leave the centre diff button off and try going for a drive.

Has the transfer case ever been serviced? The fluid should be changed every 30,000 miles, if not the works can stick and cause engagement problems. Make sure the vacuum to the front hubs is available, if the front hubs are not locking the front drive shaft will turn but no Front wheel lock up and no 4 wheel drive is available.

Warn Hubs Installation
A truck or SUV with a four-wheel drive suspension uses locking hubs on the front wheels to engage or disengage the front axle shafts from the hubs. This way, you can drive the truck normally with just rear-wheel drive, or engage four-wheel drive mode when you want to drive off-road. These hubs can wear out, and one improvement is to install a set of Warn hubs. Installing a set of Warn hubs takes about an hour.
1.Park the truck and put on the parking brake. Lift the front of the truck with the jack and put the jack stands under the front axle. Take off the front wheels with the tire iron and put them to the side.
2.Disengage the locking hubs using your hands by turning the knob on the hubs. Remove the snap rings holding the hub locks in place with the snap-ring pliers. Pull the hub off the axle.
3.Install the lock ring wheel from the Warn hub kit in the axle with the factory snap ring and the snap-ring pliers.
4.Make sure the Warn locking cap dial is turned to the "Free' position. Install the locking cap onto the lock ring wheel and hub body with a hex-head key. Reinstall the front wheels with the tire iron and lower the vehicle off the jack stands with the jack.
Thank you for using FixYa. Hope this will help your problem and don't forget to rate me.thanks,
Reymond

FOUR-WHEEL DRIVE SYSTEM

(a) Four-wheel drive control

Use the four-wheel drive control lever and center

differential lock button to select the following transfer and

center differential modes.

The "H" and "L" position of the four-wheel drive control lever

provides either lock or unlock mode of the center differential

depending on the center differential lock button position.

Use the center differential lock system if your wheels get stuck

in a ditch, or when you are driving on a slippery or bumpy

surface. When the center differential is locked, the vehicle

stability control system is automatically turned off and the

center differential lock and "VSC OFF" indicator lights come on

because the function that controls engine performance

As soon as the center differential lock switch is turned

on, the "VSC OFF" indicator light comes on. After the

wheels are out of the ditch or off the slippery or bumpy

surface, turn the center differential lock switch off.

Make sure the center differential lock indicator light and

vehicle stability control system off indicator light turn

off.

"H" (high speed position, center differential unlocked):

Lever at "H", center differential lock button left out

Use this for normal driving on all types of roads, from dry

hard-surfaced roads to wet, icy or snow-covered roads. This

position gives greater economy, quietest ride, least wear and

better vehicle control.

"H" (high speed position, center differential locked): Lever

at "H", center differential lock button pushed in

Use this for greater traction when you experience a loss of

power, such as wheel slipping, in the center differential unlock

mode.

"N" (neutral position): Lever at "N"

No power is delivered to the wheels. The vehicle must be

stopped.

"L" (low speed position, center differential unlocked):

Lever at "L", center differential lock button left out

Use this for maximum power and traction. Use this for climbing

or descending steep hills, off-road driving, and hard pulling in

sand or mud.

In this mode, the braking feeling that occurs when the wheels

are negotiating a sharp corner is further reduced than in the "L"

(low position, center differential locked) mode.

"L" (low speed position, center differential locked): Lever

at "L", center differential lock button pushed in

Use this for maximum power and traction. Use this for hard

pulling in situations the vehicle cannot negotiate even in the "L"

(low speed position, center differential unlocked) mode. Also,

using this mode when driving down steep off-road inclines will

help contribute to increased vehicle stability.

https://secure.drivers.lexus.com/lexusdrivers/info/my-lexus/resources/submit-owners-manual-search.do

Please copy and paste the link above and it will take you to the lexus site. There you will find the owners manual and you can download whatever sections you need for free.

Hope this helps.

the hubs are not locked up then? they could be sliping or broken but they are not locked for driving check that you yourself dont need to lock them in drive before you go into 4 wheel drive

does the car/truck shift funny
ok since i have no idea what transmission you have this could be a
LOCK UP TORQUE CONVERTOR SWITCH
if you have a REAR WHEEL DRIVE VEHICLE
there will be a SQUARE connector 4 wires usualy WHITE in color
on the LEFT (DRIVERS SIDE) of the transmission unplug it and see if that cures the problem
now if you have a FRONT WHEEL DRIVE VEHICLE
the CONNECTOR will be the same or close
open the hood it will also be on the DRIVERS SIDE on the side of the transmission towards the rad
unplug it and drive the vehicle and see if that cured the problem
if the vehicle is fixed replace the LOCK UP TORQUE CONVERTOR SWITCH
if it does not fix it then I need a lot more info to help you
car/truck engine size THE MORE INFO YOU CAN GIVE THE BETTER
all i know is it is a 1986 chev so i'm guessing
this happened to my 1986 monte carlo ss and my 1991 cavalier
hope this helps

This Info taken from Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Grand_Cherokee
Hopefully this will answer your question.

The redesigned WJ 1999 Grand Cherokee shared just 127 parts with its predecessor. The structure was stiffened by PorscheEngineering for sharper steering and lighter weight. The spare tire wasrelocated from the side of the cargo compartment to under the floor togreat relief of owners. The two heavy pushrod V8 engines were replaced by chrysler's first clean sheet V8 since the 60's (SOHC aluminium heads, plastic intake), Chrysler's then-new PowerTech. Although this engine produced less torquethan both previous V8s, it was lighter and got much better fuel economyand provided similar on road performance figures (the 23 gallon fueltank was replaced with one of a 20.5 gallon capacity). The Inline 6engine was also updated in 1999. 10 horsepower (7.5 kW) was added byredesigning the intake manifold. The manual transmission was dropped with this model.
While other Jeep vehicles used the Mopar 5 x 4.5 bolt circle, thiswas the first Jeep following the 1987 Chrysler buyout to receive awider bolt pattern — 5 x 5. The 5 x 5 bolt pattern (also 5 x 127 mm),although common to GM rear wheel drive vehicles and light dutytrucks/vans, has spread beyond its use with GM (and Ford with their 1973 to 1978 LTDs and Lincolns). Chrysler first used the 5 x 5 pattern on full-size half-ton Dodge Ram pickups and Dodge Ramcharger SUVs in 1986.
A notable feature available in this generation was the automatic four wheel drive option called Quadra-Drive II.With three viscous clutches, it was one of only a few four wheel drivesystems at the time with triple locking differentals, joining thecontemporary Mercedes Gelandewagen, Mercedes Unimog and Magna SteyrPinzgauer, and the only one of the four with fully automatic operation,although the axle differentials could not be manually locked like inthe other three vehicles.
The 45RFE and 545RFE automatic transmission in the WJ was notable. It included three planetary gearsets rather than the two normally used in a four-speed automatic. Thisgave it six theoretical speeds, and it would have been the firstsix-speed transmission ever produced in volume, but it was programmedto only use five of these ratios. Four were used for upshifts, with adifferent second gear for downshifts. Although five of the six ratioswere used, Chrysler decided to call it a "4-speed automatic". In 2001,the programming was changed to make use of all six ratios. Rather thanhave six forward gears, the transmission was programmed to act as afive-speed with the alternate second gear for downshifts. The RPM at70 miles per hour (110 km/h) on a 545RFE is 2000 rpm, 200 rpm less thanthe 45RFE programming. 1999 and 2000 model year WJ owners can havetheir 45RFE transmission's programming flashed to enable the extra gearas both transmissions are physically the same. The 42RE 4-speedautomatic remained the transmission for the Inline 6 engine. It was notchanged from the previous model Grand Cherokee's.

I've seen a similar issue on other transmissions where the shifter slips out of the slots in the shift forks, either due to shifter bushing wear or just general wear on tte trans. It can usually be remedied at least temporarily by popping the shifter top off the trans and resetting the forks all back to nuetral and then reinserting the shifter. It gets jammed when two forks are trying to engage two different gear sets.
On one of the 4x4 sites, they tell you how to replace the shifter bushings, cheap fix if you are lucky.
Good luck.